Frictional screw press



o. GEORG FRICTIONAL SCREW PRESS Filed June 9, 1927 March 26, 1929.

moans oi improving the manipulation and,

Patented Mar. 26, 1929.

UNITED STATES 1,707,001 ,PATENT OFFICE.

OTTO'GEGRG, 0F HERDECKE-RUHR, GERMANY.'

FnIe'rroNAL SCREW :Pansa Application filed .Tune 9, 1927, Serial No.197,611, and in Germany February 3, 1927.

This invention has reference to screw presses generally and it- 1sintended to devise the manufacture thereoii and to arrive at a moreunilorm and satisfactory mode ot operation than it was possible `toaccomplish with the devices ot this kind, as heretofore constructed. :inview thereof my invention is chiefly concerned with novel means 'ofdriving and controlling the pressure producing means et such devicesbythe employment oif friction discs and the like, and to generally:improve the construction of such machines. Screw presses to be operatedby means ot friction discs have heretofore been generally constructed insucha manner that the vertically reciprocable operating spindle or shalthas been providedA with a ily wheel which is turned to the lett or rightby the alternating ifrictional pressure producing engagement of two evenside discs keyed to a common shaft. This arrangement has given verysatisiiactory results in the cascof small friction presses, while in thecase Voit larger sized presses this -construction is open to `vari-` ousinconveniences, among which are to be mentioned very unsatisfactoryutilization o'l' energy, very heavy wearing of the tires, and mostirregular'rising of the center disc. 'if his is due to the tact that,while upon the descent ot the Center disc or intermediate i cannotreadily :tollow on account oi itslarge mass, considerable losses ofenergy are pro-` duced by sliding and grinding motion. Frequentlyconditions are so unfavorable that the intermediate disc cannot be madeto ascend `at all. y

lVarious attempts have already been made to overcome these dilhcultiesamong which Y may be mentioned the expedient ot arranging the side discintended for the raising of the center or intermediate dise in such amanner as to be staggeringly 'disposed with relation to the disc iorlowering the centerdise,

so that even in the ascent ot the center' disc the acceleration oi saiddisc will take place trom points olf lower velocity to points of highervelocity. In this case the regulation ot the side discs is ell'ected bythedisplacement et` the upper shaft, while the staggen ingly arrangedside disc serving 'for the accnding movement is displaced by followersor the like in operative marginal engage` ment therewith. This manner otoperation is very objectionable however, inasmuch as tilting andjammingof the lower shaflt are unavoidable in this construction.

New, my invention is designed to overcome these drawbacks ot theprevious construction by so arranging the sha'lts in the case et thestaggeringly arranged side discs thateach ot the two shafts is centrallyand separately operated, and in such a manner that both shafts aredisposed to be sin'niltaneonsly reciprocated.

The invention is shown by way ot exempliiieation. `in two embodiments onthe accom panying drawing in Figure l, showing a press ot the kinddescribed in side ele ration, Figure 2 is an elevation et one ot thevarious modified constructions possible.

The center disc or intern'iediate disc or head l of the friction pressis secured to the shaft or spindle 2 and is adapted to move up and downtherewith and with the ram 3 `connected to its lower end, the shaitbeing rotated to the lett an-d right. Upon its descent the rotation ofthe center dise is caused for instance by the lett-hand side disc 5which is mounted on the same shait 9 with the fast and loose pulleys, 0,7 and with the right-hand small side disc 8. Upon its ascent therotation of the center disc l is produced by the right-hand lower sidedise l() which may `'for instance be driven by a pair ot gear wheels 1l,l2 the `upper one oi' which may bepreiierably made of raw-hide, and bymeans oi? the p sha-ift, 9. The operating discs are forced against thecentral disc lin such a manner that each oi' the said operating pressurediscs is separately and indiifidually moved by the pressure member orpressure slides 13, le, adapted to be operated by two cinematicallyequivalent members, thus for inst-ance by means ojl the elbow levers l5,16 which levers are connected to each other by the link bar or pitmanrod 17 in such a manner that the levers will perform exactly the sainemovement. By this means the steering and operation of the machine takesplace without the liability of jamming and tilting, even with veryheavyside discs. The movement of the link bar 17 is either etl'ectedmanually by means of the hand-lever 18, or by means of adjustable stops19,20 Vwhich are engageable by a Contact 21 provided on the rain 3 andare adjust-ably mounted on a rod 18L to which the lever 18 is coupled,said rod being connected by the lever 17v and link 17 to the 'lever 1Gand link 17. The operating or sliding Velements 13, llt-are made to actcentrally 4upon the discs 5, 10.

In Figure 2 alniodification is shown which v v"teni of levers for the`actuation of the two dises 5 andi() in any suitable manner.

It vwill have to be understood that 1n praetice Vmodifications andchanges in the eoiistruction and arrangement of the constituentparts'arewithin the purview oi' inyinvcntion,

ezlceptas otherwise stated and .specified in the appended claims.

I claim l Y n 1.'Iii a frictional screw press the combination with anaxially reeiprocable screw spindle, a' fly wheel secured to one endetthe spindle land a rain at the other endot the spindle, of' operatingfriction discs, substantially at lright anglesto the intermediate Hywheel and engageable therewith andstaggeringly disposed with relation toeach other,

y rotating means vfor one of said dises and operative connection of saidymeans with the other ,friction dise, pressure producing means at theVoutside' ofV said discs, lsubstantially equal.

` operating levers forsaid pressure .nieans,

h'ingedly,connected to each other, and operating ineansf'or said levers.Y

Q. In a-ifrictional'screw press, the combination with Ian axiallyreciprocable screw spindle, and a fly wheel secured to one end Ythereof, ofoperating friction dises arranged substantially atrightangles to the interme- ,diate fly wheel 'and staggeringly disposed inparallel spaced relation to each other, and 1 eiigageable with said flywheel, rotating Y means for positively driving one of said frietiondises, a raw-hide gear connected to the positively driven frictiondiscs, an operative. connection between said raw-hide. gear and .theother friction disc, aftwo-armed compressing lever for each of the twofriction discs, and means for simultaneously operatv ing said, levers.

3. In a frietional screw press the combina- .tion with an axiallyreciproeable serewspinstantially equal two-armed eompressinglev rs forsaid dises outside thereof and o| erati vely and slidingly engageabletherewil h, a link connection between the free ends ot said pair oflevers, an operative lever system lo operate on said link connection,and 1n lans on the rain, operatively engageable with said operativelever system.

L1. In a frictional screw press, a movable head, a friction disk at oneside of the head and movable into and out of driving engagementtherewith, a plurality of friction disks at the opposite side of thehead and arranged one above the other and movable together into and outof position for driving engagement with the head, a driving connectionbetween the first-named disk and one of the secondnanied disks, adriving connection between theseeond-named disks, and means forsimultaneously shifting the first-named disk and thev second-named disksin opposite directions relatively to the head.

5. In a Yfi'ietional screw press, a movable head, a friction` disk atone side of the head and movable into and out of engageinenti therewith,a pair of edgewise superposed friction disks at the opposite side of thehead kand movable together into and ontof position for drivingengagement therewith, a rotatable and slidable drive shaft earryimr thefirst-named disk and one of said pair otI disks, a second rotatableandslidable shaft carrying K' the other of said pair of disks, gearingbetween th'e shafts, and means for sliding said sha'l'tsI in the samedirection in unison.

6. In a frietional screw press, a movable head, a pair of disks disposedat opposite sides of the'head and cou )led to rotate in unison andslidably monnte( for alternate engagement with and disengagement fromthe head, a third disk arranged edgewise in vertical alinement with androtatable and slidablc with one of the first-named disks, and means forshifting thc disks.

In testimony whereof I allix my si gnature.

OTT() GERG.

